KR102173943B1 - Apparatus for inspecting roll-to-roll film and method of inspecting roll-to-roll film - Google Patents

Abstract

An embodiment of the present invention provides a roll-to-roll film inspection apparatus and a roll-to-roll film inspection method capable of more accurately inspecting defects in a film. Here, the roll-to-roll film inspection apparatus includes a photographing unit and a driving unit. The photographing unit is provided on the upper side of the film transferred in the first direction and photographs the film. The driving unit reciprocates the photographing unit in a second direction crossing the first direction so as to cross the film.

Description

Roll-to-roll film inspection device and roll-to-roll film inspection method {APPARATUS FOR INSPECTING ROLL-TO-ROLL FILM AND METHOD OF INSPECTING ROLL-TO-ROLL FILM}

The present invention relates to a roll-to-roll film inspection apparatus and a roll-to-roll film inspection method, and more particularly, to a roll-to-roll film inspection apparatus and a roll-to-roll film inspection method capable of more accurately inspecting defects in a film.

In order to detect defects that may occur in the manufacturing process of a roll-to-roll film or flat plate, conventionally, a method of cutting the film into a sheet and then visually inspecting it has been used. However, since such a visual inspection method is less reliable and takes a lot of inspection time, a system for automatically inspecting defects existing in a film and a flat plate is being developed.

Transmission inspection and reflection inspection are performed to effectively inspect the defects of the film. Transmission inspection is for inspecting defects existing inside the film, and is a method in which the light irradiated from the illumination passes through the film and is input to the camera by placing the illumination in the opposite direction to the camera around the film. Reflection inspection is a method in which the light and the camera are positioned in the same direction with the film as the center so that the light irradiated from the light is reflected on the film surface and input to the camera.

Since the film or flat plate in a roll-to-roll state is continuously transferred in one direction, such a transmission test and a reflection test may be performed simultaneously when inspecting a defect in one film.

In general, however, in a roll-to-roll process, the film is transported in one direction by a roller, and the camera and lighting operate at a fixed position. Therefore, there may be a case where the defect cannot be detected depending on the viewing direction in which the defect is observed. For example, if a defect occurred in the film has a shape such as a scratch that extends in the transport direction of the film, the image of the defect photographed by a fixedly installed camera is distorted in the form of a dot. If the size is within the determination criterion, there is a problem in that the accuracy of defect detection may be deteriorated, such as being unable to be determined as a defect.

Republic of Korea Patent Publication No. 2011-0026920 (published on March 16, 2011)

In order to solve the above problems, the technical problem to be achieved by the present invention is to provide a roll-to-roll film inspection apparatus and a roll-to-roll film inspection method capable of more accurately inspecting defects in a film.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

In order to achieve the above technical problem, an embodiment of the present invention is provided on the upper side of the film transferred in the first direction, the photographing unit for photographing the film; And it provides a roll-to-roll film inspection apparatus including a driving unit for reciprocating the photographing unit in a second direction crossing the first direction so as to cross the film.

In the embodiment of the present invention, the first encoder unit for outputting a first pulse signal corresponding to the transfer speed of the film transferred in the first direction; And a second encoder for outputting a second pulse signal corresponding to the moving speed of the photographing unit, and the driving unit increases or decreases the moving speed of the photographing unit in proportion to the first pulse frequency of the first pulse signal, and the photographing The unit may increase or decrease the photographing speed in proportion to the second pulse frequency of the second pulse signal.

In an embodiment of the present invention, the photographing unit receives the second pulse signal from the second encoder when moving forward from a movement start position on one side of the film to a movement stop position on the other side of the film, and During a return movement from the movement stop position to the movement start position, the second pulse signal may not be input from the second encoder.

In an embodiment of the present invention, the basic photographing area of the photographing unit has a first photographing distance based on the first direction, and the driving unit moves the photographing unit from a moving start position of one side of the film to the other side of the film. After the forward movement to the stop position, when the return movement from the movement stop position to the movement start position is completed, it may be positioned within the first photographing distance.

In an embodiment of the present invention, it may further include an additional photographing unit provided on the upper side of the film to be spaced apart from the photographing unit along the first direction, and photographing the film transferred in a fixed state.

On the other hand, in order to achieve the above technical problem, an embodiment of the present invention is a driving unit that crosses the photographing unit in the first direction so that the photographing unit provided on the upper side of the film transferred in the first direction crosses the film. A camera moving step of reciprocating in a second direction: And it provides a roll-to-roll film inspection method including a photographing step of photographing the film while the photographing unit is moved by the driving unit.

In an embodiment of the present invention, a first signal generating step of outputting a first pulse signal corresponding to a transfer speed of the film transferred in the first direction by a first encoder unit; And a second signal generating step of outputting a second pulse signal corresponding to a moving speed of the photographing unit by a second encoder, wherein in the camera moving step, the driving unit is proportional to the first pulse frequency of the first pulse signal. Thus, the transfer speed of the photographing unit may be increased or decreased, and in the photographing step, the photographing unit may increase or decrease the photographing speed in proportion to the second pulse frequency of the second pulse signal.

In an embodiment of the present invention, the photographing unit receives the second pulse signal from the second encoder when moving forward from a movement start position on one side of the film to a movement stop position on the other side of the film, and During a return movement from the movement stop position to the movement start position, the second pulse signal may not be input from the second encoder.

In an embodiment of the present invention, the driving unit photographs the photographing unit at a movement speed previously matched to correspond to the first pulse frequency output by the first encoder unit at a point in time when the photographing unit is located at a movement start position on one side of the film. We can move wealth.

In an embodiment of the present invention, the driving unit may move the photographing unit at a pre-matched movement speed so as to correspond to the first pulse frequency output by the first encoder unit in real time.

In an embodiment of the present invention, the basic photographing area of the photographing unit has a first photographing distance based on the first direction, and the driving unit moves the photographing unit from a moving start position of one side of the film to the other side of the film. After the forward movement to the stop position, when the return movement from the movement stop position to the movement start position is completed, it may be positioned within the first photographing distance.

According to the implementation of the present invention, by transferring the photographing unit in a direction crossing the transport direction of the film transferred in a roll-to-roll method and photographing, defects that were impossible to be detected in the inspection apparatus in which photographing was performed while the photographing unit was fixed Can be detected.

In addition, according to an embodiment of the present invention, information on a film feed rate may be used as a trigger for controlling the moving speed of the photographing unit, and information on the moving speed of the photographing unit may be used as a trigger for controlling the shooting speed of the photographing unit. Through this, it is possible to match the moving speed of the photographing unit and the photographing speed of the photographing unit according to the transport speed of the film, and distortion of the photographed image can be prevented.

In addition, according to an embodiment of the present invention, the driving unit, after the photographing unit moves forward from the movement start position to the movement stop position, when the return movement from the movement stop position to the movement start position is completed, the photographing unit is within the first shooting distance. Can be positioned. Accordingly, a portion of the photographing region to be photographed while the photographing unit moves forward may overlap the previous photographing region, and an omission of an image obtained through this may be prevented.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a block diagram showing a roll-to-roll film inspection apparatus according to a first embodiment of the present invention.
2 is an exemplary view schematically showing the roll-to-roll film inspection apparatus of FIG. 1.
3 is an exemplary view illustrating an example of application of a pulse signal output from an encoder of the roll-to-roll film inspection apparatus of FIG. 1.
4 to 6 are schematic plan views for explaining an operation example of the roll-to-roll film inspection apparatus of FIG. 2.
7 is a plan view illustrating another example of driving the roll-to-roll film inspection apparatus according to the first embodiment of the present invention.
8 is an exemplary view schematically showing a roll-to-roll film inspection apparatus according to a second embodiment of the present invention.
9 is a flow chart showing a roll-to-roll film inspection method according to the first embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, bonded)” to another part, it is not only “directly connected”, but also “indirectly connected” with another member in the middle. This includes cases where there is "". In addition, when a part "includes" a certain component, it means that other components may be further provided, rather than excluding other components unless specifically stated to the contrary.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a roll-to-roll film inspection apparatus according to a first embodiment of the present invention, FIG. 2 is an exemplary view schematically showing the roll-to-roll film inspection apparatus of FIG. 1, and FIG. 3 is a roll-to-roll film inspection apparatus of FIG. It is an exemplary diagram for explaining an example of application of a pulse signal output from an encoder of a film inspection apparatus.

As shown in FIGS. 1 to 3, the roll-to-roll film inspection apparatus may include a photographing unit 100 and a driving unit 200.

The photographing unit 100 may be provided on the upper side of the film 10 transferred in the first direction A1 to take the film 10. The photographing unit 100 may be an area camera.

In addition, the roll-to-roll film inspection apparatus may include an illumination unit 150 that provides illumination light 151 so that the photographing unit 100 can take a picture.

In the present invention, both the photographing unit 100 and the lighting unit 150 are described in the form of reflection inspection provided on the upper side of the film 10, but the illumination unit 150 is provided on the lower side of the film 10 to perform transmission inspection. It can also be implemented in a form.

The driving unit 200 may reciprocate the photographing unit 100 in a second direction A2 crossing the first direction A1 so as to cross the film 10.

The driving unit 200 may reciprocate the lighting unit 150 together with the photographing unit 100 in the second direction A2. The driving unit 200 may reciprocate in the second direction A2 while maintaining the relative position of the photographing unit 100 and the lighting unit 150 in a constant state. That is, the photographing unit 100 and the lighting unit 150 are installed in a certain shape, and the driving unit 200 may simultaneously move the photographing unit 100 and the lighting unit 150 installed as described above. Hereinafter, when it is assumed that the driving unit 200 moves the photographing unit 100, it is based that the driving unit 200 moves the lighting unit 150 together with the photographing unit 100 at the same time.

In addition, the roll-to-roll film inspection apparatus may include a first encoder unit 300 and a second encoder unit 400.

The first encoder unit 300 may output a first pulse signal 310 corresponding to a transfer speed of the film 10 transferred in the first direction A1 by a roll-to-roll method.

To this end, the first encoder unit 300 may measure rotation information of the transfer roller 20 that transfers the film 10. That is, the transfer roller 20 for transferring the film 10 in a roll-to-roll method may be rotated by receiving rotational power by a first motor (not shown).

The first encoder unit 300 may have a disk coupled to a first driving shaft (not shown) of the first motor and rotating together with the first driving shaft. The first encoder unit 300 may output a first pulse signal 310 according to the amount of rotation of the original plate. Further, the rotational speed of the transfer roller may be calculated based on the first pulse signal 310, and the transfer speed of the film 10 may be calculated based on this.

As another example, the first encoder unit 300 may directly detect the transfer speed of the film 10. For example, the first encoder unit 300 directly irradiates light to the film to be transferred, and receives light reflected from or transmitted through the film, so that the first encoder unit 300 corresponds to the transfer speed of the film 10. A pulse signal 310 may also be output.

The first pulse signal 310 output from the first encoder unit 300 may have the shape of the pulse signal PS shown in FIG. 3. When the transfer speed of the film 10 is slow, the pulse signal PS may have a long pulse width W and a low frequency. That is, the number of pulses output during the unit time T may decrease (see FIG. 3A). On the other hand, if the transport speed of the film 10 is high, the pulse width W may be short and the frequency may increase. That is, the number of pulses output during the unit time T may increase (see FIG. 3(b)).

As the first encoder unit 300, various types of encoders such as a pulse encoder, a photoelectric encoder, a capacitive encoder, and a magnetic encoder may be used.

In addition, the driving unit 200 may increase or decrease the moving speed of the photographing unit 100 in proportion to the first pulse frequency of the first pulse signal 310. That is, the first pulse frequency output from the first encoder unit 300 may be used as a trigger for starting the driving unit 200.

When the transfer speed of the film 10 increases, the first pulse frequency of the first pulse signal 310 output from the first encoder unit 300 increases. Then, the driving unit 200 may increase the moving speed of the photographing unit 100 based on the first pulse frequency. In addition, when the transfer speed of the film 10 is decreased, the first pulse frequency of the first pulse signal 310 output from the first encoder unit 300 decreases. Then, the driving unit 200 may reduce the moving speed of the photographing unit 100 based on the first pulse frequency. In this case, the moving speed of the photographing unit 100 may be set to be matched in advance according to the first pulse frequency.

The second encoder unit 400 may output a second pulse signal 410 corresponding to the moving speed of the photographing unit 100.

To this end, the second encoder unit 400 may measure driving information of the driving unit 200. For example, the driving unit 200 has a second motor (not shown) that provides power to move the photographing unit 100, and the driving unit 200 rotates a second driving shaft (not shown) of the second motor. By adjusting the speed, the moving speed of the photographing unit 100 can be adjusted.

The second encoder unit 400 may be implemented in the same configuration as the first encoder unit 300, and the second encoder unit 400 is coupled to the second driving shaft and the rotation amount of the disk rotating with the second driving shaft A second pulse signal 410 according to may be output. Further, the rotational speed of the second driving shaft may be calculated based on the second pulse signal 410, and the moving speed of the photographing unit 100 may be calculated based on this.

The second pulse signal 410 output from the second encoder unit 400 may also have the form of the pulse signal PS shown in FIG. 3, and the second pulse signal 410 is also the first pulse signal 310. It may have the same characteristics as those described as an example.

The photographing unit 100 may increase or decrease the photographing speed in proportion to the second pulse frequency of the second pulse signal 410.

That is, when the moving speed of the photographing unit 100 increases, the second pulse frequency of the second pulse signal 410 output from the second encoder unit 400 increases. Then, the photographing unit 100 may increase the photographing speed. In addition, when the moving speed of the photographing unit 100 is decreased, the second pulse frequency of the second pulse signal 410 output from the second encoder unit 400 decreases. Then, the photographing unit 100 may reduce the photographing speed.

As such, the second pulse frequency output from the second encoder unit 400 may be used as a trigger for the photographing operation of the photographing unit 100.

In this embodiment, information on the transfer speed of the film 10 is used as a trigger for controlling the moving speed of the photographing unit 100, and information on the moving speed of the photographing unit 100 is used for controlling the photographing speed of the photographing unit 100. Can be used as a trigger. Through this, the moving speed of the photographing unit 100 and the photographing speed of the photographing unit 100 can be matched in accordance with the transport speed of the film 10, and distortion of the photographed image can be prevented.

In addition, since the photographing unit 100 photographs while moving in a second direction (A2) crossing the first direction (A1) in which the film 10 is transported in a roll-to-roll manner, the conventional photographing unit is photographed in a fixed state. It may be possible to detect a defect that was impossible to be detected in the inspection apparatus in which this was performed.

Meanwhile, the first encoder unit 300 may output the first pulse signal 310 in real time. In addition, the driving unit 200 may adjust the moving speed of the photographing unit 100 in real time based on the first pulse signal 310 output in real time. In this way, even if the transport speed of the film 10 changes slightly, the moving speed and the photographing speed of the photographing unit 100 can be matched in real time in response to this, so that distortion of the image can be more effectively prevented and more accurate inspection is possible. I can.

Alternatively, the driving unit 200 may adjust the moving speed of the photographing unit 100 based on the first pulse signal 310 at the time when the transfer of the film 10 starts. Since the transport speed of the film 10 can be constantly controlled, the moving speed of the photographing unit 100 is matched based on the first pulse signal 310 at the start of transport of the film 10, and the photographing unit Even if the photographing speed is matched based on the moving speed of (100), distortion of the image can be effectively prevented and accurate inspection may be possible. In addition, when this method is adopted, compared to the case of controlling the operation of the driving unit 200 and the photographing unit 100 in real time based on the first pulse signal 310 output in real time, the amount of algorithm calculation is relatively reduced and processing. Speed can also be increased.

4 to 6 are plan views for explaining an operation example of the roll-to-roll film inspection apparatus of FIG. 2.

First, as shown in FIG. 4, the driving unit 200 may reciprocate the photographing unit 100 in a second direction A2 crossing the first direction A1 so as to cross the film 10. The driving unit 200 allows the photographing unit 100 to move forward (M1) from the movement start position P1 on one side of the film 10 to the movement stop position P2 on the other side of the film 10, and stop the movement again. The return movement (M2) can be made from the position P2 to the movement start position P1. Since the film 10 is transferred in the first direction A1 even when the photographing unit 100 moves forward (M1), the photographing area 120 photographed by the photographing unit 100 is in the form shown in FIG. It can be formed obliquely like this.

The second encoder unit 400 may output the second pulse signal 410 at both the forward movement (M1) and the return movement (M2) of the photographing unit 100. However, the photographing unit 100 receives the second pulse signal 410 when moving forward (M1) from the movement start position (P1) to the movement stop position (P2), and the movement start position from the movement stop position (P2). During the return movement to (P1) (M2), the second pulse signal 410 may not be input. Through this, the photographing unit 100 can photograph only during the forward movement (M1).

Meanwhile, as described above, the photographing unit 100 may be an area camera, and thus, the photographing unit 100 may have a basic photographing area 110. In addition, the basic photographing area 110 may have a first photographing distance L1 based on the first direction A1.

The driving unit 200 moves the photographing unit 100 forward (M1) from the movement start position (P1) to the movement stop position (P2), and then moves back from the movement stop position (P2) to the movement start position (P1). When (M2) is completed, the photographing unit 100 may be positioned within the first photographing distance L1.

In other words, even while the photographing unit 100 performs one cycle of the forward movement (M1) and the return movement (M2), the film 10 is still being transferred, and the film 10 is the first shooting distance ( It is preferable that the photographing unit 100 completes one cycle before being transferred beyond L1).

In this case, when the photographing is performed while the photographing unit 100 moves forward (M1) again, the newly photographed photographing region 120b has an overlapping region 221a partially overlapping with the previous photographing region 120a. And, through this, it is possible to prevent omission of the captured image.

Meanwhile, FIG. 7 is a plan view illustrating another example of driving the roll-to-roll film inspection apparatus according to the first embodiment of the present invention. As shown in FIG. 7, a plurality of photographing units and lighting units may be provided. . In addition, each of the photographing unit and the lighting unit may be provided to be spaced apart at predetermined intervals along the second direction A2 crossing the film 10. That is, each photographing unit and the lighting unit may have different movement start positions (P1a, P1b, P1c), and each movement start position (P1a, P1b, P1c) is on the same line with respect to the second direction (A2). Can be located in

In addition, each of the photographing unit and the lighting unit may simultaneously move forward and return.

In addition, portions of the photographing areas photographed by each photographing unit may overlap each other.

That is, the photographing area 120d1 photographed by the photographing unit moving forward and returning based on the moving start position P1a at the leftmost position is a photographing that moves forward and returns based on the moving start position P1b on the right. A part of the photographing area 120e1 photographed by the part may overlap. In addition, the photographing region 120e1 may partially overlap the photographing region 120f1 photographed by the photographing unit moving forward and returning based on the moving start position P1c on the right.

In addition, the photographing region photographed later by the corresponding camera may partially overlap with the previous photographing region.

In this way, the photographing regions 120d1 and 120d2 photographed based on the moving start position P1a at the leftmost part overlap each other and the photographing region 120e1 photographed based on the movement start position P1b at the right 120e2) may also partially overlap. In addition, the photographing regions 120e1 and 120e2 may partially overlap with the photographing regions 120f1 and 120f2 photographed based on the moving start position P1c on the right, through which the photographing region may be prevented from being omitted. have.

According to this driving example, the forward moving distance and the return moving distance of each of the photographing unit and the lighting unit may be shorter. Therefore, even if the transfer speed of the film 10 is made faster, the photographing unit 100 can stably photograph the film 10 without missing, and through this, the inspection time can be shortened.

8 is an exemplary view schematically showing a roll-to-roll film inspection apparatus according to a second embodiment of the present invention. In the present embodiment, a photographing unit for photographing a film in a different form may be further provided, and since the other configurations are the same as those of the first embodiment, the same reference numerals are assigned to the same configurations, and repeated content is omitted as much as possible.

As shown in FIG. 8, the roll-to-roll film inspection apparatus according to the present embodiment may further include an additional photographing unit 500.

The additional photographing unit 500 may be provided on the upper side of the film 10 and may be provided to be spaced apart from the photographing unit 100 along the first direction A1.

The additional photographing unit 500 may photograph the film 10 transferred in a fixed state. When the photographing area of the additional photographing unit 500 is smaller than the width of the film 10, a plurality of additional photographing units 500 may be provided in the width direction of the film 10, that is, in the second direction A2. .

In addition, the roll-to-roll film inspection apparatus according to the present embodiment may include an additional lighting unit 550. The additional lighting unit 550 may provide the illumination light 551 so that the additional photographing unit 500 can take a picture.

In this embodiment, the additional photographing unit 500 and the additional lighting unit 550 are described as an example of the form of reflection inspection provided on the upper side of the film 10, but the additional lighting unit 550 is provided on the lower side of the film 10 It can also be implemented in the form of a transmission test.

As shown, the additional photographing unit 500 and the additional lighting unit 550 may be provided in front of the photographing unit 100 and the lighting unit 150 or may be provided at the rear.

Since the additional photographing unit 500 and the additional lighting unit 550 according to the present embodiment are fixed and do not move, the configuration of the driving unit for moving the additional photographing unit 500 and the additional lighting unit 550 may be omitted.

According to this embodiment, a photographing unit 100 for photographing the film 10 while moving in the width direction of the film 10 and an additional photographing unit 500 for photographing the film 10 in a fixed state are provided. Since (10) is photographed, defects in the film 10 can be inspected more accurately, without being limited in which direction the defects in the film 10 are formed. For example, even if an image photographed by one photographing unit has distorted information, a defect can be accurately inspected by comparing two photographed images with reference to an image photographed by another photographing unit.

Hereinafter, a method of inspecting a roll-to-roll film of the present invention will be described.

9 is a flow chart showing a roll-to-roll film inspection method according to the first embodiment of the present invention.

As shown in FIG. 9, the roll-to-roll film inspection method may include a camera moving step (S610) and a photographing step (S620).

The camera moving step S610 may be a step in which the driving unit reciprocates the photographing unit in a second direction crossing the first direction so that the photographing unit provided on the upper side of the film conveyed in the first direction crosses the film.

In the camera moving step S610, the driving unit may move the photographing unit forward from the moving start position on one side of the film to the moving stop position on the other side of the film, and return to the moving start position from the moving stop position.

The photographing step S620 may be a step of photographing a film while the photographing unit is moved by the driving unit.

In addition, the roll-to-roll film inspection method may include a first signal generation step (S630) and a second signal generation step (S640).

The first signal generation step S630 may be a step of outputting a first pulse signal corresponding to a transfer speed of the film transferred in the first direction by the first encoder unit.

In the camera moving step (S610), the driving unit may increase or decrease the transfer speed of the photographing unit in proportion to the first pulse frequency of the first pulse signal. That is, when the transport speed of the film increases and the first pulse frequency increases, the driving unit may increase the transport speed of the photographing unit. In addition, when the transfer speed of the film decreases and the first pulse frequency decreases, the driving unit may reduce the transfer speed of the photographing unit.

The driving unit may move the photographing unit at a pre-matched movement speed so as to correspond to the first pulse frequency output by the first encoder when the photographing unit is positioned at the movement start position. In this case, the photographing unit may move forward and return at the matched moving speed.

Alternatively, the driving unit may move the photographing unit at a previously matched movement speed so as to correspond to the first pulse frequency output by the first encoder unit in real time. In this case, the photographing unit may move forward and return to match the moving speed in real time.

The second signal generation step S640 may be a step in which the second encoder outputs a second pulse signal corresponding to the moving speed of the photographing unit.

In the second signal generation step (S640), the photographing unit receives a second pulse signal from the second encoder when moving forward from the moving start position on one side of the film to the moving stop position on the other side of the film, and at the moving stop position. During the return movement to the movement start position, the second pulse signal may not be input from the second encoder.

In the photographing step (S620), the photographing unit may increase or decrease the photographing speed in proportion to the second pulse frequency of the second pulse signal. That is, if the moving speed of the photographing unit is increased, the photographing speed may be increased, and if the moving speed of the photographing unit is slow, the photographing speed may be reduced. Through this, distortion of the acquired image can be minimized.

Meanwhile, the basic photographing area of the photographing unit may have a first photographing distance based on the first direction. The driving unit may allow the photographing unit to be located within the first photographing distance when the photographing unit moves forward from the movement start position to the movement stop position and then the return movement from the movement stop position to the movement start position is completed.

Accordingly, a portion of the photographing region to be photographed while the photographing unit moves forward may overlap the previous photographing region, and an omission of an image obtained through this may be prevented.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

10: film
100: filming department
150: lighting unit
200: drive unit
300: first encoder unit
310: first pulse signal
400: second encoder unit
500: additional photographing unit
550: additional lighting unit

Claims (11)

A photographing unit provided on the upper side of the film transferred in the first direction and photographing the film;
A first encoder for outputting a first pulse signal corresponding to a transfer speed of the film transferred in the first direction;
A driving unit reciprocating and moving the photographing unit in a second direction crossing the first direction so as to cross the film, and increasing or decreasing the moving speed of the photographing unit in proportion to a first pulse frequency of the first pulse signal;
A second encoder for outputting a second pulse signal corresponding to the moving speed of the photographing unit; And
It is provided on the upper side of the film and includes an additional photographing unit for photographing the film transferred in a fixed state,
The photographing unit increases or decreases a photographing speed for photographing while moving in the second direction in proportion to a second pulse frequency of the second pulse signal,
The additional photographing unit is provided in the front or rear of the photographing unit along the first direction to be spaced apart from the photographing unit, and the image photographed by the photographing unit and the image photographed by the additional photographing unit are compared to inspect the combination of the film. Roll-to-roll film inspection device, characterized in that to be. delete The method of claim 1,
The photographing unit,
When moving forward from a movement start position on one side of the film to a movement stop position on the other side of the film, the second pulse signal is input from the second encoder unit,
The roll-to-roll film inspection apparatus, characterized in that when the movement is stopped from the movement stop position to the movement start position, the second pulse signal is not input from the second encoder. The method of claim 1,
The basic photographing area of the photographing unit has a first photographing distance based on the first direction,
The driving unit, when the photographing unit moves forward from a movement start position on one side of the film to a movement stop position on the other side of the film, and then when the return movement from the movement stop position to the movement start position is completed, the first Roll-to-roll film inspection device, characterized in that positioned within the shooting distance. delete A first signal generating step of outputting a first pulse signal corresponding to a transfer speed of the film transferred in the first direction by the first encoder;
A camera moving step in which a driving unit reciprocates the photographing unit in a second direction crossing the first direction so that the photographing unit provided on the upper side of the film transported in the first direction crosses the film:
A second signal generation step of outputting a second pulse signal corresponding to a moving speed of the photographing unit by a second encoder; And
A photographing step of photographing the film while the photographing unit is moved by the driving unit,
In the camera moving step, the driving unit increases or decreases the transfer speed of the photographing unit in proportion to the first pulse frequency of the first pulse signal,
In the photographing step, the photographing unit increases or decreases the photographing speed in proportion to the second pulse frequency of the second pulse signal,
An additional photographing unit provided on the upper side of the film and for photographing the film transferred in a fixed state is provided in the front or rear of the photographing unit along the first direction to be spaced apart from the photographing unit, and an image photographed by the photographing unit And comparing the image captured by the additional photographing unit to inspect the bonding of the film. delete The method of claim 6,
The photographing unit,
When moving forward from a movement start position on one side of the film to a movement stop position on the other side of the film, the second pulse signal is input from the second encoder unit,
The roll-to-roll film inspection method, characterized in that the second pulse signal is not received from the second encoder when the movement is returned from the movement stop position to the movement start position. The method of claim 6,
The driving unit is a roll, characterized in that moving the photographing unit at a pre-matched movement speed so as to correspond to the first pulse frequency output from the first encoder at a point in time when the photographing unit is located at a moving start position on one side of the film Two-roll film inspection method. The method of claim 6,
The driving unit, the roll-to-roll film inspection method, characterized in that moving the photographing unit at a moving speed matched in advance so as to correspond to the first pulse frequency output by the first encoder unit in real time. The method of claim 6,
The basic photographing area of the photographing unit has a first photographing distance based on the first direction,
The driving unit, when the photographing unit moves forward from a movement start position on one side of the film to a movement stop position on the other side of the film, and then when the return movement from the movement stop position to the movement start position is completed, the first Roll-to-roll film inspection method, characterized in that positioned within the shooting distance.

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